There are three animals X, Y and Z . The animal X can stay in water as well as on land and can breathe through its moist skin as well as lungs. The animal Y always lives in water and had gills for breathing. On the other hand, animal Z lives in soil and breathes only through its skin.
Which animal could be a fish ?

Answer

To determine which animal could be a fish among X, Y, and Z, let's analyze the characteristics of each animal step by step.

### Step 1: Analyze Animal X
- **Characteristics**: Animal X can stay in water as well as on land. It breathes through moist skin and lungs.
- **Conclusion**: This animal is likely an amphibian, such as a frog or salamander, because amphibians can live both in water and on land and have the ability to breathe through their skin and lungs.

### Step 2: Analyze Animal Y
- **Characteristics**: Animal Y always lives in water and has gills for breathing.
- **Conclusion**: This animal is most likely a fish. Fish are aquatic animals that have gills, allowing them to extract oxygen from water. Since Y is described as always living in water and having gills, it fits the definition of a fish perfectly.

### Step 3: Analyze Animal Z
- **Characteristics**: Animal Z lives in soil and breathes only through its skin.
- **Conclusion**: This animal is likely an earthworm. Earthworms live in soil and respire through their moist skin, which is a characteristic of many soil-dwelling organisms.

### Final Conclusion
Based on the analysis:
- Animal X is an amphibian (not a fish).
- Animal Y is a fish (this is the answer to the question).
- Animal Z is an earthworm (not a fish).

Therefore, the animal that could be a fish is **Animal Y**.

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